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# Re: encrypt/decrypt

- Date: Sun, 25 Aug 1996 05:24:41 PDT
- From:
- Cc: moo-cows@parc.xerox.com
- Content-Type: TEXT/PLAIN; charset=US-ASCII
- In-Reply-To: <199608250106.UAA01139@gently.netins.net>

    Encryption is not difficult.

    Its just messy, to get it so that it is secure.

    Essentially, an encryption routine, simply stores your message in a form
    that is not recognizeable. Security is supplied, by making it difficult for
    someone else to figure out how you made the data unrecognizeable.

    Cryptology, is an ArtForm, but you can make unauthorized decryption nearly
    impossible by mapping your alphabet across to an arbitrary code alphabet
    utilizing a non-repeating or almost random function, and changing the
    mapping periodically, so that it is difficult to use things like character
    frequency tables etc, to figure out what the message says.

    Of course, you want to be able to decrypt it using a valid authorized
    decryption program, but that requires that you have the ability to
    synchronize both programs in some manner, so that they do the same task
    at the same time, only in reverse.

    If I rewrote the Crypt function I designed for Mod0 so that it was a paired
    function, it still wouldn't decrypt the passwords, since they are arrived at
    by a one-way algorythm. :)

    But, I would be willing to do that for you, if you feel that you need
    such a function.

    				GREY

    GRAEME SMITH                         email: grysmith@freenet.edmonton.ab.ca
    YMCA Edmonton
    (Back on line!>

References:

- encrypt/decrypt

- From: "David Morris" <bweaver@worf.netins.net>

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